git.sesse.net Git - vlc/blob - plugins/dvd/input_dvd.c

   1 /*****************************************************************************
   2  * input_dvd.c: DVD raw reading plugin.
   3  *****************************************************************************
   4  * This plugins should handle all the known specificities of the DVD format,
   5  * especially the 2048 bytes logical block size.
   6  * It depends on:
   7  *  -input_netlist used to read packets
   8  *  -libdvdcss for access and unscrambling
   9  *  -dvd_ifo for ifo parsing and analyse
  10  *  -dvd_udf to find files
  11  *****************************************************************************
  12  * Copyright (C) 1998-2001 VideoLAN
  13  * $Id: input_dvd.c,v 1.104 2001/12/07 16:47:47 jobi Exp $
  14  *
  15  * Author: Stéphane Borel <stef@via.ecp.fr>
  16  *
  17  * This program is free software; you can redistribute it and/or modify
  18  * it under the terms of the GNU General Public License as published by
  19  * the Free Software Foundation; either version 2 of the License, or
  20  * (at your option) any later version.
  21  *
  22  * This program is distributed in the hope that it will be useful,
  23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  * GNU General Public License for more details.
  26  *
  27  * You should have received a copy of the GNU General Public License
  28  * along with this program; if not, write to the Free Software
  29  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  30  *****************************************************************************/
  31
  32 #define MODULE_NAME dvd
  33 #include "modules_inner.h"
  34
  35 /*****************************************************************************
  36  * Preamble
  37  *****************************************************************************/
  38 #include "defs.h"
  39
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42 #include <string.h>
  43
  44 #ifdef HAVE_UNISTD_H
  45 #   include <unistd.h>
  46 #endif
  47
  48 #include <fcntl.h>
  49 #include <sys/types.h>
  50 #include <string.h>
  51 #include <errno.h>
  52
  53 #ifdef STRNCASECMP_IN_STRINGS_H
  54 #   include <strings.h>
  55 #endif
  56
  57 #if defined( WIN32 )
  58 #   include <io.h>                                                 /* read() */
  59 #else
  60 #   include <sys/uio.h>                                      /* struct iovec */
  61 #endif
  62
  63 #ifdef GOD_DAMN_DMCA
  64 #   include "dummy_dvdcss.h"
  65 #else
  66 #   include <videolan/dvdcss.h>
  67 #endif
  68
  69 #include "config.h"
  70 #include "common.h"
  71 #include "intf_msg.h"
  72 #include "threads.h"
  73 #include "mtime.h"
  74 #include "iso_lang.h"
  75 #include "tests.h"
  76
  77 #if defined( WIN32 )
  78 #   include "input_iovec.h"
  79 #endif
  80
  81 #include "main.h"
  82
  83 #include "modules.h"
  84 #include "modules_export.h"
  85
  86 #include "stream_control.h"
  87 #include "input_ext-intf.h"
  88 #include "input_ext-dec.h"
  89 #include "input_ext-plugins.h"
  90
  91 #include "input_dvd.h"
  92 #include "dvd_ifo.h"
  93 #include "dvd_summary.h"
  94
  95 #include "debug.h"
  96
  97 /* how many blocks DVDRead will read in each loop */
  98 #define DVD_BLOCK_READ_ONCE 64
  99 #define DVD_DATA_READ_ONCE  (4 * DVD_BLOCK_READ_ONCE)
 100
 101 /* Size of netlist */
 102 #define DVD_NETLIST_SIZE    256
 103
 104 /*****************************************************************************
 105  * Local prototypes
 106  *****************************************************************************/
 107 /* called from outside */
 108 static int  DVDProbe        ( probedata_t *p_data );
 109 static void DVDInit         ( struct input_thread_s * );
 110 static void DVDEnd          ( struct input_thread_s * );
 111 static void DVDOpen         ( struct input_thread_s * );
 112 static void DVDClose        ( struct input_thread_s * );
 113 static int  DVDSetArea      ( struct input_thread_s *, struct input_area_s * );
 114 static int  DVDSetProgram   ( struct input_thread_s *, pgrm_descriptor_t * );
 115 static int  DVDRead         ( struct input_thread_s *, data_packet_t ** );
 116 static void DVDSeek         ( struct input_thread_s *, off_t );
 117 static int  DVDRewind       ( struct input_thread_s * );
 118
 119 /* called only inside */
 120 static int  DVDChooseAngle( thread_dvd_data_t * );
 121 static int  DVDFindCell( thread_dvd_data_t * );
 122 static int  DVDFindSector( thread_dvd_data_t * );
 123 static int  DVDChapterSelect( thread_dvd_data_t *, int );
 124
 125 /*****************************************************************************
 126  * Functions exported as capabilities. They are declared as static so that
 127  * we don't pollute the namespace too much.
 128  *****************************************************************************/
 129 void _M( input_getfunctions )( function_list_t * p_function_list )
 130 {
 131 #define input p_function_list->functions.input
 132     p_function_list->pf_probe = DVDProbe;
 133     input.pf_init             = DVDInit;
 134     input.pf_open             = DVDOpen;
 135     input.pf_close            = DVDClose;
 136     input.pf_end              = DVDEnd;
 137     input.pf_init_bit_stream  = InitBitstream;
 138     input.pf_read             = DVDRead;
 139     input.pf_set_area         = DVDSetArea;
 140     input.pf_set_program      = DVDSetProgram;
 141     input.pf_demux            = input_DemuxPS;
 142     input.pf_new_packet       = input_NetlistNewPacket;
 143     input.pf_new_pes          = input_NetlistNewPES;
 144     input.pf_delete_packet    = input_NetlistDeletePacket;
 145     input.pf_delete_pes       = input_NetlistDeletePES;
 146     input.pf_rewind           = DVDRewind;
 147     input.pf_seek             = DVDSeek;
 148 #undef input
 149 }
 150
 151 /*
 152  * Data reading functions
 153  */
 154
 155 /*****************************************************************************
 156  * DVDProbe: verifies that the stream is a PS stream
 157  *****************************************************************************/
 158 static int DVDProbe( probedata_t *p_data )
 159 {
 160     input_thread_t * p_input = (input_thread_t *)p_data;
 161
 162     char * psz_name = p_input->p_source;
 163     int i_score = 5;
 164
 165     if( TestMethod( INPUT_METHOD_VAR, "dvd" ) )
 166     {
 167         return( 999 );
 168     }
 169
 170     if( ( strlen(psz_name) > 4 ) && !strncasecmp( psz_name, "dvd:", 4 ) )
 171     {
 172         /* If the user specified "dvd:" then it's probably a DVD */
 173         i_score = 100;
 174         psz_name += 4;
 175     }
 176
 177     return( i_score );
 178 }
 179
 180 /*****************************************************************************
 181  * DVDInit: initializes DVD structures
 182  *****************************************************************************/
 183 static void DVDInit( input_thread_t * p_input )
 184 {
 185     thread_dvd_data_t *  p_dvd;
 186     input_area_t *       p_area;
 187     int                  i_title;
 188     int                  i_chapter;
 189     int                  i;
 190
 191     p_dvd = malloc( sizeof(thread_dvd_data_t) );
 192     if( p_dvd == NULL )
 193     {
 194         intf_ErrMsg( "dvd error: out of memory" );
 195         p_input->b_error = 1;
 196         return;
 197     }
 198
 199     p_input->p_plugin_data = (void *)p_dvd;
 200     p_input->p_method_data = NULL;
 201
 202     p_dvd->dvdhandle = (dvdcss_handle) p_input->p_handle;
 203
 204     if( dvdcss_seek( p_dvd->dvdhandle, 0, DVDCSS_NOFLAGS ) < 0 )
 205     {
 206         intf_ErrMsg( "dvd error: %s", dvdcss_error( p_dvd->dvdhandle ) );
 207         p_input->b_error = 1;
 208         return;
 209     }
 210
 211     /* We read DVD_BLOCK_READ_ONCE in each loop, so the input will receive
 212      * DVD_DATA_READ_ONCE at most */
 213     p_dvd->i_block_once = DVD_BLOCK_READ_ONCE;
 214     /* this value mustn't be modifed */
 215     p_input->i_read_once = DVD_DATA_READ_ONCE;
 216
 217     /* Reading structures initialisation */
 218     input_NetlistInit( p_input, DVD_NETLIST_SIZE, 2 * DVD_NETLIST_SIZE,
 219                        DVD_NETLIST_SIZE, DVD_LB_SIZE, p_dvd->i_block_once );
 220     intf_WarnMsg( 2, "dvd info: netlist initialized" );
 221
 222     /* Ifo allocation & initialisation */
 223     if( IfoCreate( p_dvd ) < 0 )
 224     {
 225         intf_ErrMsg( "dvd error: allcation error in ifo" );
 226         dvdcss_close( p_dvd->dvdhandle );
 227         free( p_dvd );
 228         p_input->b_error = 1;
 229         return;
 230     }
 231
 232     if( IfoInit( p_dvd->p_ifo ) < 0 )
 233     {
 234         intf_ErrMsg( "dvd error: fatal failure in ifo" );
 235         IfoDestroy( p_dvd->p_ifo );
 236         dvdcss_close( p_dvd->dvdhandle );
 237         free( p_dvd );
 238         p_input->b_error = 1;
 239         return;
 240     }
 241
 242     /* Set stream and area data */
 243     vlc_mutex_lock( &p_input->stream.stream_lock );
 244
 245     /* Initialize ES structures */
 246     input_InitStream( p_input, sizeof( stream_ps_data_t ) );
 247
 248 #define title_inf p_dvd->p_ifo->vmg.title_inf
 249     intf_WarnMsg( 2, "dvd info: number of titles: %d", title_inf.i_title_nb );
 250
 251 #define area p_input->stream.pp_areas
 252     /* We start from 1 here since the default area 0
 253      * is reserved for video_ts.vob */
 254     for( i = 1 ; i <= title_inf.i_title_nb ; i++ )
 255     {
 256         input_AddArea( p_input );
 257
 258         /* Titles are Program Chains */
 259         area[i]->i_id = i;
 260
 261         /* Absolute start offset and size
 262          * We can only set that with vts ifo, so we do it during the
 263          * first call to DVDSetArea */
 264         area[i]->i_start = 0;
 265         area[i]->i_size = 0;
 266
 267         /* Number of chapters */
 268         area[i]->i_part_nb = title_inf.p_attr[i-1].i_chapter_nb;
 269         area[i]->i_part = 1;
 270
 271         /* Number of angles */
 272         area[i]->i_angle_nb = 0;
 273         area[i]->i_angle = 1;
 274
 275         /* Offset to vts_i_0.ifo */
 276         area[i]->i_plugin_data = p_dvd->p_ifo->i_start +
 277                        title_inf.p_attr[i-1].i_start_sector;
 278     }
 279 #undef area
 280
 281     /* Get requested title - if none try the first title */
 282     i_title = main_GetIntVariable( INPUT_TITLE_VAR, 1 );
 283     if( i_title <= 0 || i_title > title_inf.i_title_nb )
 284     {
 285         i_title = 1;
 286     }
 287
 288 #undef title_inf
 289
 290     /* Get requested chapter - if none defaults to first one */
 291     i_chapter = main_GetIntVariable( INPUT_CHAPTER_VAR, 1 );
 292     if( i_chapter <= 0 )
 293     {
 294         i_chapter = 1;
 295     }
 296
 297     p_input->stream.pp_areas[i_title]->i_part = i_chapter;
 298
 299     p_area = p_input->stream.pp_areas[i_title];
 300
 301     /* set title, chapter, audio and subpic */
 302     DVDSetArea( p_input, p_area );
 303
 304     vlc_mutex_unlock( &p_input->stream.stream_lock );
 305
 306     return;
 307 }
 308
 309 /*****************************************************************************
 310  * DVDOpen: open dvd
 311  *****************************************************************************/
 312 static void DVDOpen( struct input_thread_s *p_input )
 313 {
 314     dvdcss_handle dvdhandle;
 315     char * psz_parser;
 316     char * psz_device;
 317
 318     vlc_mutex_lock( &p_input->stream.stream_lock );
 319
 320     /* If we are here we can control the pace... */
 321     p_input->stream.b_pace_control = 1;
 322
 323     p_input->stream.b_seekable = 1;
 324     p_input->stream.p_selected_area->i_size = 0;
 325
 326     p_input->stream.p_selected_area->i_tell = 0;
 327
 328     vlc_mutex_unlock( &p_input->stream.stream_lock );
 329
 330     /* Parse input string : dvd:device[:rawdevice] */
 331     if( strlen( p_input->p_source ) > 4
 332          && !strncasecmp( p_input->p_source, "dvd:", 4 ) )
 333     {
 334         psz_parser = psz_device = p_input->p_source + 4;
 335     }
 336     else
 337     {
 338         psz_parser = psz_device = p_input->p_source;
 339     }
 340
 341     while( *psz_parser && *psz_parser != '@' )
 342     {
 343         psz_parser++;
 344     }
 345
 346     if( *psz_parser == '@' )
 347     {
 348         /* Found raw device */
 349         *psz_parser = '\0';
 350         psz_parser++;
 351
 352         main_PutPszVariable( "DVDCSS_RAW_DEVICE", psz_parser );
 353     }
 354
 355     intf_WarnMsg( 2, "input: dvd=%s raw=%s", psz_device, psz_parser );
 356
 357     dvdhandle = dvdcss_open( psz_device );
 358
 359     if( dvdhandle == NULL )
 360     {
 361         intf_ErrMsg( "dvd error: dvdcss can't open device" );
 362         p_input->b_error = 1;
 363         return;
 364     }
 365
 366     p_input->p_handle = (void *) dvdhandle;
 367 }
 368
 369 /*****************************************************************************
 370  * DVDClose: close dvd
 371  *****************************************************************************/
 372 static void DVDClose( struct input_thread_s *p_input )
 373 {
 374     /* Clean up libdvdcss */
 375     dvdcss_close( (dvdcss_handle) p_input->p_handle );
 376 }
 377
 378 /*****************************************************************************
 379  * DVDEnd: frees unused data
 380  *****************************************************************************/
 381 static void DVDEnd( input_thread_t * p_input )
 382 {
 383     thread_dvd_data_t *     p_dvd;
 384
 385     p_dvd = (thread_dvd_data_t*)p_input->p_plugin_data;
 386
 387     IfoDestroy( p_dvd->p_ifo );
 388
 389     free( p_dvd );
 390
 391     input_NetlistEnd( p_input );
 392 }
 393
 394 /*****************************************************************************
 395  * DVDSetProgram: Does nothing, a DVD is mono-program
 396  *****************************************************************************/
 397 static int DVDSetProgram( input_thread_t * p_input,
 398             pgrm_descriptor_t * p_program )
 399 {
 400     return 0;
 401 }
 402
 403 /*****************************************************************************
 404  * DVDSetArea: initialize input data for title x, chapter y.
 405  * It should be called for each user navigation request.
 406  *****************************************************************************
 407  * Take care that i_title starts from 0 (vmg) and i_chapter start from 1.
 408  * Note that you have to take the lock before entering here.
 409  *****************************************************************************/
 410 static int DVDSetArea( input_thread_t * p_input, input_area_t * p_area )
 411 {
 412     thread_dvd_data_t *  p_dvd;
 413     es_descriptor_t *    p_es;
 414     u16                  i_id;
 415     int                  i_vts_title;
 416     int                  i_audio_nb = 0;
 417     int                  i_spu_nb = 0;
 418     int                  i_audio;
 419     int                  i_spu;
 420     int                  i;
 421
 422     p_dvd = (thread_dvd_data_t*)p_input->p_plugin_data;
 423
 424     /* we can't use the interface slider until initilization is complete */
 425     p_input->stream.b_seekable = 0;
 426
 427     if( p_area != p_input->stream.p_selected_area )
 428     {
 429         /* Reset the Chapter position of the old title */
 430         p_input->stream.p_selected_area->i_part = 0;
 431
 432         /*
 433          *  We have to load all title information
 434          */
 435         /* Change the default area */
 436         p_input->stream.p_selected_area =
 437                     p_input->stream.pp_areas[p_area->i_id];
 438
 439         /* title number: it is not vts nb!,
 440          * it is what appears in the interface list */
 441         p_dvd->i_title = p_area->i_id;
 442         p_dvd->p_ifo->i_title = p_dvd->i_title;
 443
 444         /* set number of chapters of current title */
 445         p_dvd->i_chapter_nb = p_area->i_part_nb;
 446
 447         /* ifo vts */
 448         if( IfoTitleSet( p_dvd->p_ifo ) < 0 )
 449         {
 450             intf_ErrMsg( "dvd error: fatal error in vts ifo" );
 451             free( p_dvd );
 452             p_input->b_error = 1;
 453             return -1;
 454         }
 455
 456 #define vmg p_dvd->p_ifo->vmg
 457 #define vts p_dvd->p_ifo->vts
 458         /* title position inside the selected vts */
 459         i_vts_title = vmg.title_inf.p_attr[p_dvd->i_title-1].i_title_num;
 460         p_dvd->i_title_id =
 461             vts.title_inf.p_title_start[i_vts_title-1].i_title_id;
 462
 463         intf_WarnMsgImm( 3, "dvd: title %d vts_title %d pgc %d",
 464                          p_dvd->i_title, i_vts_title, p_dvd->i_title_id );
 465
 466
 467         /*
 468          * Angle management
 469          */
 470         p_dvd->i_angle_nb = vmg.title_inf.p_attr[p_dvd->i_title-1].i_angle_nb;
 471         p_dvd->i_angle = main_GetIntVariable( INPUT_ANGLE_VAR, 1 );
 472         if( ( p_dvd->i_angle <= 0 ) || p_dvd->i_angle > p_dvd->i_angle_nb )
 473         {
 474             p_dvd->i_angle = 1;
 475         }
 476
 477         /*
 478          * Set selected title start and size
 479          */
 480
 481         /* title set offset XXX: convert to block values */
 482         p_dvd->i_title_start =
 483             vts.i_pos + vts.manager_inf.i_title_vob_start_sector;
 484
 485         /* last video cell */
 486         p_dvd->i_cell = 0;
 487         p_dvd->i_prg_cell = -1 +
 488             vts.title_unit.p_title[p_dvd->i_title_id-1].title.i_cell_nb;
 489
 490         if( DVDFindCell( p_dvd ) < 0 )
 491         {
 492             intf_ErrMsg( "dvd error: can't find title end" );
 493             p_input->b_error = 1;
 494             return -1;
 495         }
 496
 497         /* temporary hack to fix size in some dvds */
 498         if( p_dvd->i_cell >= vts.cell_inf.i_cell_nb )
 499         {
 500             p_dvd->i_cell = vts.cell_inf.i_cell_nb - 1;
 501         }
 502
 503         p_dvd->i_sector = 0;
 504         p_dvd->i_size = vts.cell_inf.p_cell_map[p_dvd->i_cell].i_end_sector;
 505
 506         if( DVDChapterSelect( p_dvd, 1 ) < 0 )
 507         {
 508             intf_ErrMsg( "dvd error: can't find first chapter" );
 509             p_input->b_error = 1;
 510             return -1;
 511         }
 512
 513         /* Force libdvdcss to check its title key.
 514          * It is only useful for title cracking method. Methods using the
 515          * decrypted disc key are fast enough to check the key at each seek */
 516
 517         if( dvdcss_seek( p_dvd->dvdhandle, p_dvd->i_start,
 518                             DVDCSS_SEEK_KEY ) < 0 )
 519         {
 520             intf_ErrMsg( "dvd error: %s", dvdcss_error( p_dvd->dvdhandle ) );
 521             return -1;
 522         }
 523
 524         p_dvd->i_size -= p_dvd->i_sector + 1;
 525
 526         IfoPrintTitle( p_dvd );
 527
 528         /* Area definition */
 529         p_input->stream.p_selected_area->i_start = LB2OFF( p_dvd->i_start );
 530         p_input->stream.p_selected_area->i_size = LB2OFF( p_dvd->i_size );
 531         p_input->stream.p_selected_area->i_angle_nb = p_dvd->i_angle_nb;
 532         p_input->stream.p_selected_area->i_angle = p_dvd->i_angle;
 533
 534 #if 0
 535         /* start at the beginning of the title */
 536         /* FIXME: create a conf option to select whether to restart
 537          * title or not */
 538         p_input->stream.p_selected_area->i_tell = 0;
 539         p_input->stream.p_selected_area->i_part = 1;
 540 #endif
 541
 542         /*
 543          * Destroy obsolete ES by reinitializing program 0
 544          * and find all ES in title with ifo data
 545          */
 546         if( p_input->stream.pp_programs != NULL )
 547         {
 548             /* We don't use input_EndStream here since
 549              * we keep area structures */
 550
 551             for( i = 0 ; i < p_input->stream.i_selected_es_number ; i++ )
 552             {
 553                 input_UnselectES( p_input, p_input->stream.pp_selected_es[i] );
 554             }
 555
 556             free( p_input->stream.pp_selected_es );
 557             input_DelProgram( p_input, p_input->stream.p_selected_program );
 558
 559             p_input->stream.pp_selected_es = NULL;
 560             p_input->stream.i_selected_es_number = 0;
 561         }
 562
 563         input_AddProgram( p_input, 0, sizeof( stream_ps_data_t ) );
 564         p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
 565
 566         /* No PSM to read in DVD mode, we already have all information */
 567         p_input->stream.p_selected_program->b_is_ok = 1;
 568
 569         p_es = NULL;
 570
 571         /* ES 0 -> video MPEG2 */
 572         IfoPrintVideo( p_dvd );
 573
 574         p_es = input_AddES( p_input, p_input->stream.p_selected_program,
 575                 0xe0, 0 );
 576         p_es->i_stream_id = 0xe0;
 577         p_es->i_type = MPEG2_VIDEO_ES;
 578         p_es->i_cat = VIDEO_ES;
 579         if( p_main->b_video )
 580         {
 581             input_SelectES( p_input, p_es );
 582         }
 583
 584 #define audio_status \
 585     vts.title_unit.p_title[p_dvd->i_title_id-1].title.pi_audio_status[i-1]
 586         /* Audio ES, in the order they appear in .ifo */
 587         for( i = 1 ; i <= vts.manager_inf.i_audio_nb ; i++ )
 588         {
 589             IfoPrintAudio( p_dvd, i );
 590
 591             /* audio channel is active if first byte is 0x80 */
 592             if( audio_status.i_available )
 593             {
 594                 i_audio_nb++;
 595
 596                 switch( vts.manager_inf.p_audio_attr[i-1].i_coding_mode )
 597                 {
 598                 case 0x00:              /* AC3 */
 599                     i_id = ( ( 0x80 + audio_status.i_position ) << 8 ) | 0xbd;
 600                     p_es = input_AddES( p_input,
 601                                p_input->stream.p_selected_program, i_id, 0 );
 602                     p_es->i_stream_id = 0xbd;
 603                     p_es->i_type = AC3_AUDIO_ES;
 604                     p_es->b_audio = 1;
 605                     p_es->i_cat = AUDIO_ES;
 606                     strcpy( p_es->psz_desc, DecodeLanguage( hton16(
 607                         vts.manager_inf.p_audio_attr[i-1].i_lang_code ) ) );
 608                     strcat( p_es->psz_desc, " (ac3)" );
 609
 610                     break;
 611                 case 0x02:
 612                 case 0x03:              /* MPEG audio */
 613                     i_id = 0xc0 + audio_status.i_position;
 614                     p_es = input_AddES( p_input,
 615                                     p_input->stream.p_selected_program, i_id
 616                                     , 0 );
 617                     p_es->i_stream_id = i_id;
 618                     p_es->i_type = MPEG2_AUDIO_ES;
 619                     p_es->b_audio = 1;
 620                     p_es->i_cat = AUDIO_ES;
 621                     strcpy( p_es->psz_desc, DecodeLanguage( hton16(
 622                         vts.manager_inf.p_audio_attr[i-1].i_lang_code ) ) );
 623                     strcat( p_es->psz_desc, " (mpeg)" );
 624
 625                     break;
 626                 case 0x04:              /* LPCM */
 627
 628                     i_id = ( ( 0xa0 + audio_status.i_position ) << 8 ) | 0xbd;
 629                     p_es = input_AddES( p_input,
 630                                     p_input->stream.p_selected_program,
 631                                     i_id, 0 );
 632                     p_es->i_stream_id = 0xbd;
 633                     p_es->i_type = LPCM_AUDIO_ES;
 634                     p_es->b_audio = 1;
 635                     p_es->i_cat = AUDIO_ES;
 636                     strcpy( p_es->psz_desc, DecodeLanguage( hton16(
 637                         vts.manager_inf.p_audio_attr[i-1].i_lang_code ) ) );
 638                     strcat( p_es->psz_desc, " (lpcm)" );
 639
 640                     break;
 641                 case 0x06:              /* DTS */
 642                     i_id = ( ( 0x88 + audio_status.i_position ) << 8 ) | 0xbd;
 643                     intf_ErrMsg( "dvd warning: DTS audio not handled yet"
 644                                  "(0x%x)", i_id );
 645                     break;
 646                 default:
 647                     i_id = 0;
 648                     intf_ErrMsg( "dvd warning: unknown audio type %.2x",
 649                              vts.manager_inf.p_audio_attr[i-1].i_coding_mode );
 650                 }
 651             }
 652         }
 653 #undef audio_status
 654 #define spu_status \
 655     vts.title_unit.p_title[p_dvd->i_title_id-1].title.pi_spu_status[i-1]
 656
 657         /* Sub Picture ES */
 658
 659         for( i = 1 ; i <= vts.manager_inf.i_spu_nb; i++ )
 660         {
 661             IfoPrintSpu( p_dvd, i );
 662
 663             if( spu_status.i_available )
 664             {
 665                 i_spu_nb++;
 666
 667                 /*  there are several streams for one spu */
 668                 if(  vts.manager_inf.video_attr.i_ratio )
 669                 {
 670                     /* 16:9 */
 671                     switch( vts.manager_inf.video_attr.i_perm_displ )
 672                     {
 673                     case 1:
 674                         i_id = ( ( 0x20 + spu_status.i_position_pan ) << 8 )
 675                                | 0xbd;
 676                         break;
 677                     case 2:
 678                         i_id = ( ( 0x20 + spu_status.i_position_letter ) << 8 )
 679                                | 0xbd;
 680                         break;
 681                     default:
 682                         i_id = ( ( 0x20 + spu_status.i_position_wide ) << 8 )
 683                                | 0xbd;
 684                         break;
 685                     }
 686                 }
 687                 else
 688                 {
 689                     /* 4:3 */
 690                     i_id = ( ( 0x20 + spu_status.i_position_43 ) << 8 )
 691                            | 0xbd;
 692                 }
 693                 p_es = input_AddES( p_input,
 694                                     p_input->stream.p_selected_program,
 695                                     i_id, 0 );
 696                 p_es->i_stream_id = 0xbd;
 697                 p_es->i_type = DVD_SPU_ES;
 698                 p_es->i_cat = SPU_ES;
 699                 strcpy( p_es->psz_desc, DecodeLanguage( hton16(
 700                     vts.manager_inf.p_spu_attr[i-1].i_lang_code ) ) );
 701             }
 702         }
 703 #undef spu_status
 704         if( p_main->b_audio )
 705         {
 706             /* For audio: first one if none or a not existing one specified */
 707             i_audio = main_GetIntVariable( INPUT_CHANNEL_VAR, 1 );
 708             if( i_audio < 0 || i_audio > i_audio_nb )
 709             {
 710                 main_PutIntVariable( INPUT_CHANNEL_VAR, 1 );
 711                 i_audio = 1;
 712             }
 713             if( i_audio > 0 && i_audio_nb > 0 )
 714             {
 715                 if( main_GetIntVariable( AOUT_SPDIF_VAR, 0 ) ||
 716                     ( main_GetIntVariable( INPUT_AUDIO_VAR, 0 ) ==
 717                       REQUESTED_AC3 ) )
 718                 {
 719                     int     i_ac3 = i_audio;
 720                     while( ( p_input->stream.pp_es[i_ac3]->i_type !=
 721                              AC3_AUDIO_ES ) && ( i_ac3 <=
 722                              vts.manager_inf.i_audio_nb ) )
 723                     {
 724                         i_ac3++;
 725                     }
 726                     if( p_input->stream.pp_es[i_ac3]->i_type == AC3_AUDIO_ES )
 727                     {
 728                         input_SelectES( p_input,
 729                                         p_input->stream.pp_es[i_ac3] );
 730                     }
 731                 }
 732                 else
 733                 {
 734                     input_SelectES( p_input,
 735                                     p_input->stream.pp_es[i_audio] );
 736                 }
 737             }
 738         }
 739
 740         if( p_main->b_video )
 741         {
 742             /* for spu, default is none */
 743             i_spu = main_GetIntVariable( INPUT_SUBTITLE_VAR, 0 );
 744             if( i_spu < 0 || i_spu > i_spu_nb )
 745             {
 746                 main_PutIntVariable( INPUT_SUBTITLE_VAR, 0 );
 747                 i_spu = 0;
 748             }
 749             if( i_spu > 0 && i_spu_nb > 0 )
 750             {
 751                 i_spu += vts.manager_inf.i_audio_nb;
 752                 input_SelectES( p_input, p_input->stream.pp_es[i_spu] );
 753             }
 754         }
 755     } /* i_title >= 0 */
 756     else
 757     {
 758         p_area = p_input->stream.p_selected_area;
 759     }
 760 #undef vts
 761 #undef vmg
 762
 763     /*
 764      * Chapter selection
 765      */
 766
 767     if( p_area->i_part != p_dvd->i_chapter )
 768     {
 769         if( ( p_area->i_part > 0 ) &&
 770             ( p_area->i_part <= p_area->i_part_nb ))
 771         {
 772             if( DVDChapterSelect( p_dvd, p_area->i_part ) < 0 )
 773             {
 774                 intf_ErrMsg( "dvd error: can't set chapter in area" );
 775                 p_input->b_error = 1;
 776                 return -1;
 777             }
 778
 779             p_input->stream.p_selected_area->i_tell =
 780                                    LB2OFF( p_dvd->i_start ) - p_area->i_start;
 781             p_input->stream.p_selected_area->i_part = p_dvd->i_chapter;
 782
 783             intf_WarnMsg( 4, "dvd info: chapter %d start at: %lld",
 784                                         p_area->i_part, p_area->i_tell );
 785         }
 786         else
 787         {
 788             p_area->i_part = 1;
 789             p_dvd->i_chapter = 1;
 790         }
 791     }
 792
 793 #define title \
 794     p_dvd->p_ifo->vts.title_unit.p_title[p_dvd->i_title_id-1].title
 795     if( p_area->i_angle != p_dvd->i_angle )
 796     {
 797         if( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
 798         {
 799             if( ( p_area->i_angle - p_dvd->i_angle ) < 0 )
 800             {
 801                 p_dvd->i_cell = 0;
 802             }
 803             p_dvd->i_prg_cell += ( p_area->i_angle - p_dvd->i_angle );
 804             p_dvd->i_angle = p_area->i_angle;
 805
 806             DVDFindSector( p_dvd );
 807             p_dvd->i_cell += p_dvd->i_angle_cell;
 808         }
 809         else
 810         {
 811             p_dvd->i_angle = p_area->i_angle;
 812         }
 813
 814         intf_WarnMsg( 3, "dvd info: angle %d selected", p_area->i_angle );
 815     }
 816
 817     /* warn interface that something has changed */
 818     p_input->stream.b_seekable = 1;
 819     p_input->stream.b_changed = 1;
 820
 821     return 0;
 822 }
 823
 824
 825 /*****************************************************************************
 826  * DVDRead: reads data packets into the netlist.
 827  *****************************************************************************
 828  * Returns -1 in case of error, 0 if everything went well, and 1 in case of
 829  * EOF.
 830  *****************************************************************************/
 831 static int DVDRead( input_thread_t * p_input,
 832                     data_packet_t ** pp_packets )
 833 {
 834     thread_dvd_data_t *     p_dvd;
 835     netlist_t *             p_netlist;
 836     struct iovec *          p_vec;
 837     struct data_packet_s *  pp_data[DVD_DATA_READ_ONCE];
 838     u8 *                    pi_cur;
 839     int                     i_block_once;
 840     int                     i_packet_size;
 841     int                     i_iovec;
 842     int                     i_packet;
 843     int                     i_pos;
 844     int                     i_read_blocks;
 845     int                     i_sector;
 846     boolean_t               b_eof;
 847     boolean_t               b_eot;
 848     boolean_t               b_eoc;
 849
 850     p_dvd = (thread_dvd_data_t *)p_input->p_plugin_data;
 851     p_netlist = (netlist_t *)p_input->p_method_data;
 852
 853     b_eoc = 0;
 854     i_sector = p_dvd->i_title_start + p_dvd->i_sector;
 855     i_block_once = p_dvd->i_end_sector - p_dvd->i_sector + 1;
 856
 857
 858     /* Get the position of the next cell if we're at cell end */
 859     if( i_block_once <= 0 )
 860     {
 861         int     i_angle;
 862
 863         p_dvd->i_cell++;
 864         p_dvd->i_angle_cell++;
 865
 866         /* Find cell index in adress map */
 867         if( DVDFindSector( p_dvd ) < 0 )
 868         {
 869             pp_packets[0] = NULL;
 870             intf_ErrMsg( "dvd error: can't find next cell" );
 871             return 1;
 872         }
 873
 874         /* Position the fd pointer on the right address */
 875         if( ( i_sector = dvdcss_seek( p_dvd->dvdhandle,
 876                                       p_dvd->i_title_start + p_dvd->i_sector,
 877                                       DVDCSS_SEEK_MPEG ) ) < 0 )
 878         {
 879             intf_ErrMsg( "dvd error: %s", dvdcss_error( p_dvd->dvdhandle ) );
 880             return -1;
 881         }
 882
 883         /* update chapter : it will be easier when we have navigation
 884          * ES support */
 885         if( p_dvd->i_chapter < ( p_dvd->i_chapter_nb - 1 ) )
 886         {
 887             if( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
 888             {
 889                 i_angle = p_dvd->i_angle - 1;
 890             }
 891             else
 892             {
 893                 i_angle = 0;
 894             }
 895             if( title.chapter_map.pi_start_cell[p_dvd->i_chapter] <=
 896                 ( p_dvd->i_prg_cell - i_angle + 1 ) )
 897             {
 898                 p_dvd->i_chapter++;
 899                 b_eoc = 1;
 900             }
 901         }
 902
 903         i_block_once = p_dvd->i_end_sector - p_dvd->i_sector + 1;
 904     }
 905
 906     /* The number of blocks read is the max between the requested
 907      * value and the leaving block in the cell */
 908     if( i_block_once > p_dvd->i_block_once )
 909     {
 910         i_block_once = p_dvd->i_block_once;
 911     }
 912 /*
 913 intf_WarnMsg( 2, "Sector: 0x%x Read: %d Chapter: %d", p_dvd->i_sector, i_block_once, p_dvd->i_chapter );
 914 */
 915     p_netlist->i_read_once = i_block_once;
 916
 917     /* Get an iovec pointer */
 918     if( ( p_vec = input_NetlistGetiovec( p_netlist ) ) == NULL )
 919     {
 920         intf_ErrMsg( "dvd error: can't get iovec" );
 921         return -1;
 922     }
 923
 924     /* Reads from DVD */
 925     i_read_blocks = dvdcss_readv( p_dvd->dvdhandle, p_vec,
 926                                   i_block_once, DVDCSS_READ_DECRYPT );
 927
 928     /* Update netlist indexes: we don't do it in DVDGetiovec since we
 929      * need know the real number of blocks read */
 930     input_NetlistMviovec( p_netlist, i_read_blocks, pp_data );
 931
 932     /* Update global position */
 933     p_dvd->i_sector += i_read_blocks;
 934
 935     i_packet = 0;
 936
 937     /* Read headers to compute payload length */
 938     for( i_iovec = 0 ; i_iovec < i_read_blocks ; i_iovec++ )
 939     {
 940         i_pos = 0;
 941
 942         while( i_pos < p_netlist->i_buffer_size )
 943         {
 944             pi_cur = (u8*)p_vec[i_iovec].iov_base + i_pos;
 945
 946             /*default header */
 947             if( U32_AT( pi_cur ) != 0x1BA )
 948             {
 949                 /* That's the case for all packets, except pack header. */
 950                 i_packet_size = U16_AT( pi_cur + 4 );
 951                 pp_packets[i_packet] = input_NetlistNewPtr( p_netlist );
 952                 (*pp_data[i_iovec]->pi_refcount)++;
 953                 pp_packets[i_packet]->pi_refcount =
 954                     pp_data[i_iovec]->pi_refcount;
 955                 pp_packets[i_packet]->p_buffer = pp_data[i_iovec]->p_buffer;
 956             }
 957             else
 958             {
 959                 /* MPEG-2 Pack header. */
 960                 i_packet_size = 8;
 961                 pp_packets[i_packet] = pp_data[i_iovec];
 962             }
 963
 964             pp_packets[i_packet]->p_payload_start =
 965                     pp_packets[i_packet]->p_buffer + i_pos;
 966
 967             pp_packets[i_packet]->p_payload_end =
 968                     pp_packets[i_packet]->p_payload_start + i_packet_size + 6;
 969
 970             i_packet++;
 971             i_pos += i_packet_size + 6;
 972         }
 973     }
 974
 975     pp_packets[i_packet] = NULL;
 976
 977     vlc_mutex_lock( &p_input->stream.stream_lock );
 978
 979     p_input->stream.p_selected_area->i_tell =
 980         LB2OFF( i_sector + i_read_blocks ) -
 981         p_input->stream.p_selected_area->i_start;
 982     if( b_eoc )
 983     {
 984         /* We modify i_part only at end of chapter not to erase
 985          * some modification from the interface */
 986         p_input->stream.p_selected_area->i_part = p_dvd->i_chapter;
 987     }
 988
 989     b_eot = !( p_input->stream.p_selected_area->i_tell
 990                   < p_input->stream.p_selected_area->i_size );
 991     b_eof = b_eot && ( ( p_dvd->i_title + 1 ) >= p_input->stream.i_area_nb );
 992
 993     if( b_eof )
 994     {
 995         vlc_mutex_unlock( &p_input->stream.stream_lock );
 996         return 1;
 997     }
 998
 999     if( b_eot )
1000     {
1001         intf_WarnMsg( 4, "dvd info: new title" );
1002         p_dvd->i_title++;
1003         DVDSetArea( p_input, p_input->stream.pp_areas[p_dvd->i_title] );
1004         vlc_mutex_unlock( &p_input->stream.stream_lock );
1005         return 0;
1006     }
1007
1008     vlc_mutex_unlock( &p_input->stream.stream_lock );
1009
1010     if( i_read_blocks == i_block_once )
1011     {
1012         return 0;
1013     }
1014
1015     return -1;
1016 }
1017
1018 /*****************************************************************************
1019  * DVDRewind : reads a stream backward
1020  *****************************************************************************/
1021 static int DVDRewind( input_thread_t * p_input )
1022 {
1023     return( -1 );
1024 }
1025
1026 /*****************************************************************************
1027  * DVDSeek : Goes to a given position on the stream.
1028  *****************************************************************************
1029  * This one is used by the input and translate chronological position from
1030  * input to logical position on the device.
1031  * The lock should be taken before calling this function.
1032  *****************************************************************************/
1033 static void DVDSeek( input_thread_t * p_input, off_t i_off )
1034 {
1035     thread_dvd_data_t *     p_dvd;
1036     int                     i_block;
1037     int                     i_prg_cell;
1038     int                     i_cell;
1039     int                     i_chapter;
1040     int                     i_angle;
1041
1042     p_dvd = ( thread_dvd_data_t * )p_input->p_plugin_data;
1043
1044     /* we have to take care of offset of beginning of title */
1045     p_dvd->i_sector = OFF2LB(i_off + p_input->stream.p_selected_area->i_start)
1046                        - p_dvd->i_title_start;
1047
1048     i_prg_cell = 0;
1049     i_chapter = 0;
1050
1051     /* parse vobu address map to find program cell */
1052     while( title.p_cell_play[i_prg_cell].i_end_sector < p_dvd->i_sector  )
1053     {
1054         i_prg_cell++;
1055     }
1056
1057     p_dvd->i_prg_cell = i_prg_cell;
1058
1059     if( DVDChooseAngle( p_dvd ) < 0 )
1060     {
1061         p_input->b_error = 1;
1062         return;
1063     }
1064
1065     p_dvd->i_cell = 0;
1066
1067     /* Find first title cell which is inside program cell */
1068     if( DVDFindCell( p_dvd ) < 0 )
1069     {
1070         /* no following cell : we're at eof */
1071         intf_ErrMsg( "dvd error: cell seeking failed" );
1072         p_input->b_error = 1;
1073         return;
1074     }
1075
1076     i_cell = p_dvd->i_cell;
1077
1078 #define cell p_dvd->p_ifo->vts.cell_inf.p_cell_map[i_cell]
1079     /* parse cell address map to find title cell containing sector */
1080     while( cell.i_end_sector < p_dvd->i_sector )
1081     {
1082         i_cell++;
1083     }
1084
1085     p_dvd->i_cell = i_cell;
1086
1087     /* if we're inside a multi-angle zone, we have to choose i_sector
1088      * in the current angle ; we can't do it all the time since cells
1089      * can be very wide out of such zones */
1090     if( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
1091     {
1092         p_dvd->i_sector = MAX(
1093                 cell.i_start_sector,
1094                 title.p_cell_play[p_dvd->i_prg_cell].i_start_sector );
1095     }
1096
1097     p_dvd->i_end_sector = MIN(
1098             cell.i_end_sector,
1099             title.p_cell_play[p_dvd->i_prg_cell].i_end_sector );
1100 #undef cell
1101     /* update chapter */
1102     if( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
1103     {
1104         i_angle = p_dvd->i_angle - 1;
1105     }
1106     else
1107     {
1108         i_angle = 0;
1109     }
1110     if( p_dvd->i_chapter_nb > 1 )
1111     {
1112         while( ( title.chapter_map.pi_start_cell[i_chapter] <=
1113                     ( p_dvd->i_prg_cell - i_angle + 1 ) ) &&
1114                ( i_chapter < ( p_dvd->i_chapter_nb - 1 ) ) )
1115         {
1116             i_chapter++;
1117         }
1118     }
1119     else
1120     {
1121         i_chapter = 1;
1122     }
1123
1124     p_dvd->i_chapter = i_chapter;
1125     p_input->stream.p_selected_area->i_part = p_dvd->i_chapter;
1126
1127     if( ( i_block = dvdcss_seek( p_dvd->dvdhandle,
1128                                  p_dvd->i_title_start + p_dvd->i_sector,
1129                                  DVDCSS_SEEK_MPEG ) ) < 0 )
1130     {
1131         intf_ErrMsg( "dvd error: %s", dvdcss_error( p_dvd->dvdhandle ) );
1132         p_input->b_error = 1;
1133         return;
1134     }
1135
1136     p_input->stream.p_selected_area->i_tell =
1137         LB2OFF ( i_block ) - p_input->stream.p_selected_area->i_start;
1138
1139     intf_WarnMsg( 7, "Program Cell: %d Cell: %d Chapter: %d",
1140                      p_dvd->i_prg_cell, p_dvd->i_cell, p_dvd->i_chapter );
1141
1142
1143     return;
1144 }
1145
1146 #define cell  p_dvd->p_ifo->vts.cell_inf
1147
1148 /*****************************************************************************
1149  * DVDFindCell: adjust the title cell index with the program cell
1150  *****************************************************************************/
1151 static int DVDFindCell( thread_dvd_data_t * p_dvd )
1152 {
1153     int                 i_cell;
1154     int                 i_index;
1155
1156     i_cell = p_dvd->i_cell;
1157     i_index = p_dvd->i_prg_cell;
1158
1159     if( i_cell >= cell.i_cell_nb )
1160     {
1161         return -1;
1162     }
1163
1164     while( ( ( title.p_cell_pos[i_index].i_vob_id !=
1165                    cell.p_cell_map[i_cell].i_vob_id ) ||
1166       ( title.p_cell_pos[i_index].i_cell_id !=
1167                    cell.p_cell_map[i_cell].i_cell_id ) ) &&
1168            ( i_cell < cell.i_cell_nb - 1 ) )
1169     {
1170         i_cell++;
1171     }
1172
1173 /*
1174 intf_WarnMsg( 12, "FindCell: i_cell %d i_index %d found %d nb %d",
1175                     p_dvd->i_cell,
1176                     p_dvd->i_prg_cell,
1177                     i_cell,
1178                     cell.i_cell_nb );
1179 */
1180
1181     p_dvd->i_cell = i_cell;
1182
1183     return 0;
1184 }
1185
1186 #undef cell
1187
1188 /*****************************************************************************
1189  * DVDFindSector: find cell index in adress map from index in
1190  * information table program map and give corresponding sectors.
1191  *****************************************************************************/
1192 static int DVDFindSector( thread_dvd_data_t * p_dvd )
1193 {
1194
1195     if( p_dvd->i_sector > title.p_cell_play[p_dvd->i_prg_cell].i_end_sector )
1196     {
1197         p_dvd->i_prg_cell++;
1198
1199         if( DVDChooseAngle( p_dvd ) < 0 )
1200         {
1201             return -1;
1202         }
1203     }
1204
1205     if( DVDFindCell( p_dvd ) < 0 )
1206     {
1207         intf_ErrMsg( "dvd error: can't find sector" );
1208         return -1;
1209     }
1210
1211     /* Find start and end sectors of new cell */
1212 #if 1
1213     p_dvd->i_sector = MAX(
1214          p_dvd->p_ifo->vts.cell_inf.p_cell_map[p_dvd->i_cell].i_start_sector,
1215          title.p_cell_play[p_dvd->i_prg_cell].i_start_sector );
1216     p_dvd->i_end_sector = MIN(
1217          p_dvd->p_ifo->vts.cell_inf.p_cell_map[p_dvd->i_cell].i_end_sector,
1218          title.p_cell_play[p_dvd->i_prg_cell].i_end_sector );
1219 #else
1220     p_dvd->i_sector = title.p_cell_play[p_dvd->i_prg_cell].i_start_sector;
1221     p_dvd->i_end_sector = title.p_cell_play[p_dvd->i_prg_cell].i_end_sector;
1222 #endif
1223
1224 /*
1225     intf_WarnMsg( 12, "cell: %d sector1: 0x%x end1: 0x%x\n"
1226                    "index: %d sector2: 0x%x end2: 0x%x\n"
1227                    "category: 0x%x ilvu end: 0x%x vobu start 0x%x",
1228         p_dvd->i_cell,
1229         p_dvd->p_ifo->vts.cell_inf.p_cell_map[p_dvd->i_cell].i_start_sector,
1230         p_dvd->p_ifo->vts.cell_inf.p_cell_map[p_dvd->i_cell].i_end_sector,
1231         p_dvd->i_prg_cell,
1232         title.p_cell_play[p_dvd->i_prg_cell].i_start_sector,
1233         title.p_cell_play[p_dvd->i_prg_cell].i_end_sector,
1234         title.p_cell_play[p_dvd->i_prg_cell].i_category,
1235         title.p_cell_play[p_dvd->i_prg_cell].i_first_ilvu_vobu_esector,
1236         title.p_cell_play[p_dvd->i_prg_cell].i_last_vobu_start_sector );
1237 */
1238
1239     return 0;
1240 }
1241
1242 /*****************************************************************************
1243  * DVDChapterSelect: find the cell corresponding to requested chapter
1244  *****************************************************************************/
1245 static int DVDChapterSelect( thread_dvd_data_t * p_dvd, int i_chapter )
1246 {
1247
1248     /* Find cell index in Program chain for current chapter */
1249     p_dvd->i_prg_cell = title.chapter_map.pi_start_cell[i_chapter-1] - 1;
1250     p_dvd->i_cell = 0;
1251     p_dvd->i_sector = 0;
1252
1253     DVDChooseAngle( p_dvd );
1254
1255     /* Search for cell_index in cell adress_table and initialize
1256      * start sector */
1257     if( DVDFindSector( p_dvd ) < 0 )
1258     {
1259         intf_ErrMsg( "dvd error: can't select chapter" );
1260         return -1;
1261     }
1262
1263     /* start is : beginning of vts vobs + offset to vob x */
1264     p_dvd->i_start = p_dvd->i_title_start + p_dvd->i_sector;
1265
1266     /* Position the fd pointer on the right address */
1267     if( ( p_dvd->i_start = dvdcss_seek( p_dvd->dvdhandle,
1268                                         p_dvd->i_start,
1269                                         DVDCSS_SEEK_MPEG ) ) < 0 )
1270     {
1271         intf_ErrMsg( "dvd error: %s", dvdcss_error( p_dvd->dvdhandle ) );
1272         return -1;
1273     }
1274
1275     p_dvd->i_chapter = i_chapter;
1276     return 0;
1277 }
1278
1279 /*****************************************************************************
1280  * DVDChooseAngle: select the cell corresponding to the selected angle
1281  *****************************************************************************/
1282 static int DVDChooseAngle( thread_dvd_data_t * p_dvd )
1283 {
1284     /* basic handling of angles */
1285     switch( ( ( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
1286                     >> 12 ) )
1287     {
1288         /* we enter a muli-angle section */
1289         case 0x5:
1290             p_dvd->i_prg_cell += p_dvd->i_angle - 1;
1291             p_dvd->i_angle_cell = 0;
1292             break;
1293         /* we exit a multi-angle section */
1294         case 0x9:
1295         case 0xd:
1296             p_dvd->i_prg_cell += p_dvd->i_angle_nb - p_dvd->i_angle;
1297             break;
1298     }
1299
1300     return 0;
1301 }
1302
1303 #undef title